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    Serum osteocalcin and CTX-MMP concentration in young exercising thoroughbred racehorses (2005)

    Art
    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Autoren
    Carstanjen, B
    Amory, H
    Sulon, J
    Hars, O
    Remy, B
    Langlois, P
    Lepage, O M
    Quelle
    Journal of veterinary medicine a; 52(3) — S. 114–120
    ISSN: 0931-184x
    Sprache
    Englisch
    Verweise
    Pubmed: 15836441
    Kontakt
    Klinik für Pferde, allgemeine Chirurgie und Radiologie

    Oertzenweg 19 b
    14163 Berlin
    Tel.+49 30 838 62299 Fax.+49 30 838 62529
    email:pferdeklinik@vetmed.fu-berlin.de

    Abstract / Zusammenfassung

    Bone responds to exercise with changes in bone (re-)modelling, which might be monitored non-invasively with biochemical bone markers. The aim of this study was to evaluate the influence of exercise on serum osteocalcin and serum carboxy-terminal cross-linked telopeptide of type I collagen generated by matrix metalloproteinases (CTX-MMP) concentration in young racehorses. Seventy-one 2 to 4-year-old Thoroughbreds were included in this prospective infield study. Blood sampling was performed six times (i.e. six sampling cycles) during a 9-month period. Serum samples were analysed with commercial osteocalcin and CTX-MMP radioimmunoassays. Two-year-old racehorses had higher serum osteocalcin and CTX-MMP values than 3-year-old horses. Gender and training amplitude did not significantly influence serum osteocalcin and CTX-MMP values. Two-year-old horses showed an increase in osteocalcin values between cycles 2 and 3 and an increase in serum CTX-MMP values between cycles 1 and 2. Serum osteocalcin and CTX-MMP concentrations decreased between cycles 4 and 5, and 5 and 6. Three-year-old horses showed an increase in serum osteocalcin levels between cycles 3 and 4 and an increase in serum CTX-MMP concentrations between cycles 1 and 2, and 3 and 4. Serum osteocalcin levels decreased between cycles 5 and 6, whereas serum CTX-MMP levels decreased between cycles 4 and 5, and 5 and 6. Two- and three-year-old horses showed a decreased osteocalcin/CTX-MMP ratio between cycles 1 and 2. Moreover, 2-year-old horses showed an increase in the osteocalcin/CTX-MMP ratio between cycles 2 and 3. Sore shin formation did not significantly influence serum osteocalcin and CTX-MMP values. Serum osteocalcin and CTX-MMP are promising bone markers for monitoring exercise induced changes in equine bone metabolism.